Sound-interference eliminator



July 27,1926. 1,593,780

I w. J. SCOTT SQUND I NTERFERENCE ELIMI NATOR Filed Dec. 9, 1922 2Sheets-Sheet L zunum! zfi a v Ja 5% July 27 1926.

W J. SCOTT SOUND INTERFERENCE ELIMINATOR 2 Sheets-Sheet -2 Filed Dec. 9,,922

The invention mists 't and interference eY'iminastmg means and h i for hs object to yrovido instrumoni; which is selective in its action and.which is zuffioptool 5 in operation to eliminate or subdue xneohami.-cal sounds or noises of on sbrup, explosive or discootimlous aha-motes;such as thoseoi machinery, firs electrical static and the like anddifiorentiato, prolong, oonvsy emphasizo and sustain for ioiivorylistener or receiving operator the dist'm guishabio singing, cotozi oruniformly pitched sounds or tones such those of *sho human voice,musics-l instru" ments, oswireloss tolophono graph messages sod iii theand that the apparatus in its avaiiable adaptations princips may usedeither for also duos? oo 20 spoken moss 'ss lasts same aircraft, wasbetween tho oooupss 01' in tho vioiroity o as overwheim w y o 5 noise,or m; it

object ViEW tho s. tio'n om: sists is s consi motiom comb oi parts ofwhich 2:. 30 shows in so wherein 5 Figm'o 1 a 10m of a tyggicsl a'sr'ekmwiy s5 o 3 smplo fox" "so some sircsaif'h so mm s imorrsp zooon'v stionfl oozm'mmiooir" snd oonstitufing :ofins; .19; tho sazoloprin'cipfio of ops 1% my oo-toozsdisg sppliczmos M0395, filodJsob 19Figure 2 is a cross so tiorool View ..e some on she plans indica'nsd othe limo 5? ---2 of Figure 1.

Figure 3 is ioingituclinali of tho modification constituting finement oftho structure which Early designed for use in oomzeotwn 2* Wirelessreceiving stations and. wheztein gmduate expansion or dispersion of thosound oonvoying oohmm mitter chamber is sfi'eoteo. is szivancs or on thetransmission aids 511s subcfividing dis-- phragm or alone Figuxo i isthe trons- Serial Tier the voice (such as s u tween the speaker anti thesudotor or m comm .s'uon Wlbh Wi Kess re colts/m s'zsinon, oars-babesessmbi ally, a

condos"; or having a sound 3 ozaoh having oo'rmin silos xor aii'ectmgthe thoreth rough, id

medium moi the lino of dis m between a ironsmittisg and the reoeivimg mtho oonduc'yor or com: vo yor anti o'fifwoois the trsssnnitting andyrooeivin {foe column of mm or conveyor: in 351s omb oi the instrumentwhich is s J one} 2 the tramswoos by which the sounds to be immu itiesthe ixflstrument, communiom-s wish on lorgof expansion or dispersioimohsmbor 1 .1, and the path of outlet fxom the chamber 1 is o,own-dividing or solocsing modium psrfloulsrly repossessed by 13 havingporforations 1% from wich no: tubes 15 which open in-- to rm expansionchamber 16 bounded by a diap Wm 17 siso having psrpiorr'ations withoomlmmicato ashes 18 which am m" "ssombied is graduated or step so corospondingly assemble 1? tbs six column h diaphragm until is 1' o m thomam reoo .4 its Em-3o. communithe or'omod. upon. a sui'isblo oonneceedtherewith 1. 021: the outer member abs, and. one grouped tubos ozt-ocolvmg subs and. which dustsol or stop s-zsp enpassages between theox 2, m tuber 1G and the receiving tube fr the diaphragm 17 so that izhomovable membor of oomaogjondisg'iy "u. s communicating s Home the mrardd micrcphmles for use 111 repeizing hese gradually expzmdv i2?communicate elemezmiit'a loi 112 sub-diby ilm dim spasm A 1 mm wnduc-1th 11050 additienal ammuu the awning V; M u communication with the Jmore 0:: out 0.;

. by means 0f ZLbLS carried; by vm'" the Q3 a a anhrzmm 1'? and boundedb" a .7 l Q 3 divs-- with which connected tha tuba:

m wmmunimtmm with reduced in merge 0 55119 main. .13 pm acting msat 1011spersed 1 u the umbm through that pro Bounds presentation simple mica ucmmssci lon that clear 1...);(11 of Minnow;- capacity d uni i'l theinlet l9.

mien, What; is

rainy; describe claimed as new and 1s:

1. An instrument far selectiveiy Kisinguishing the tunes 0; atransmitted me 0m oomempemneeus unreiated sounds,

the same having 302.116; tmnsmitting pas 21x16; subdividiln diaphragminter cpting the mama; he passage being provided in ad ceaha plane thediaphragm Wixh graduated c finding means and in rem" 'ihere'i withgraduated condey ln insitrumeislt seiecu" 02185 of tmmsaaitt :1 sound.conduct. l

sly "with means for 15- the sound carrying apparatus Winch as dessxgbedin lecting openings which are respectively bling means and having minuteselecting graduable in area. openings, said sub-dividing elementconsist- 3. An instrument for selectively distining of. relativelymovable members for varyguishing the tones of a transmitted message ingthe relative positioning of the correfrom contemporaneous unrelatedsounds, the sponding openings in each tor the variat on same having asound conducting passage, of the area of the openings in thesub-d1v1dand a sub-dividing medium intercepting the ing element. same,said passage being provided with a 8. An instrument for selectivelydistingraded enlargement of hell 01 bor sh pe guishing the tones of atransmitted message with its larger end directed toward and in fromcontemporaneous unrelated sounds, the communication with the inletthereof. same having a sound conducting passage 4. An instrument forselectively distinprovided progressively with means for disguishing thetones of a transmitted message parsing and reassembling the soundcarryfrom contemporaneous unrelated sounds, the in medium, and asub-dividing element dis same having a sound conducting passage, posedbetween said dispersing and-reassemand a sub-dividing mediumintercepting the bling means and having minute selecting same, saidpassage being provided '(Wlth a openings variable in area, saidsub-dividingseries of graded expansions or enlargeelement consistingofafixed diaphragm proments extending from the sub-dividing meid d withperforations and a rotary disk d um t0 the inlet carried by thediaphragm and also pro- 5. An instrument for selectively (listinvidedWith perforations and a manually acguishing the tones of a transmittedmessage tuable device for effecting its adjustment. from contemporaneousunrelated sounds, the 9. An instrument for selectively distinsame havinga sound conducting passage, guishing the tones of a transmitted messageand a sub-dividing medium intercepting the from contemporaneousunrelated sounds, the same; said passage being provided with a samehaving asound conducting passage, series of graded expansions orenlargements and a subdividing medium intercepting the of hell or hornshape, the initial units of same, said passage being provided with asaid series having their larger ends comseries of graded expansions orenlargements municating with the inlets and the linal of extending fromthe sub-dividing medium to said series having its larger end adjacentthe outlet, and said sub-dividing medium besaid subdividing means. ingprovided With minute selecting openings, 6. An instrument forselectively distinand means for varying the effective area guishing thetones of a transmitted mcsthereof. sage from contemporaneous unrelated10. An instrument for selectively distinsounds, the same having a soundconducting guishing the tones of a transmitted message passage, asub-dividing medium intercepting from contemporaneous unrelated soundsthe the sanie, said passage being provided with same having a soundconducting passage, :1 a succession of graded expansions orensub-dividing medium intercepting the same, la-rgements of bell or hornshape communisaid passage beingprovided with a succescating with inletsat their larger ends, and sion of graded expansions or enlargements acommon bell mouthed elemcnt located adof hell or horn shapecommunicating with jacent the plane of the sub-dividing medium the inletat their larger ends, and a common and communicating with saidenlargements. bell mouth element located adjacent the 7. An instrumentfor selectively distinplane of the subdividing medium and dis- .guishingthe tones of a transmitted message posed with its larger end adjacentsaid mefrom contemporaneous unrelated sounds, the dium and With itssmaller endin communisame having a sound conducting passage cation withsaid enlargements.

provided progressively with means for dis- In testimony whereof heatlixes his signapersing and reassembling the sound carryture. ingmedium, and a sub-dividing element disposed between the dispersing andreassern; WILLIAM J SCOTT.

